Weighing-scale.



R. H. HELSEL.

WEIGHING SCALE.

APPLIcATIoN man ma. ao. nel?.

1,242,551. Patented Oct. 9,1917.

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R. H. HELSEL. WEIGHING SCALE. APPLlcArloN man MAR. 3o. 1917.

Patented Oct. 9, 1917.

JNVENTOR.- Rel/ben Iii/abel,

UNITED STATES PATENT OFFICE.

REUBEN H. HELSEL, OF NEW YORK, N. Y., ASSIGNOR T0 COLUMBIA WEIGHINGMACHINE COMPANY, OF NEW YORK,

WEIGHING-SCALE.

N. Y., A CORPORATION 0F NEW YORK.

Patented 0613.9, 1917.

Application Med March 30, 1917, Serial 110.158,51?.

To all whom it may concern.'

Be it known that I, Riemann H. HELSEL, a citizen of the United States,and a resident of the borough of Manhattan, in the city, county, andState of New York, have invented certain new and useful Im rovements inVeighing-Scales, of which t e following is a specification.

This invention relates to weighing scales of the type shown in myco-pending application filed January 26, 1916, Serial No. 74,307 inwhich the weight of a load on a platform or receiver is registered on ascale beam or beams by the adjusting of a weight on the scale beam bythe person using the scale, and in which means are provide to permit thewei hing of a load within a predetermined weight and to prevent theoperation of the scale beam by a load on the receiver greater than suchpredetermined weight, said means being releasable by coin controllingmeans to permit the operation of the scale beam and the weighing of aload greater than such predetermined weight.

In the scale shown in my prior application hereinbefore referred to thecoin controlled means are operable after a coin has been deposited in acoin slot by the manual operation of a lever, and it is the object ofthe present invention to rovide means to release the means preventln theoperation of the scale beam operable y a coin as it is deposited in acoin slot.

A further object of the invention is to provide means to prevent theoperation of the means actuated by a deposited coin to release the meanspreventing the operation of the scale beam by an instrument other than acoin inserted in the coin shot.

In the drawings accompanying and form-2 ing a part of this`specification FigurelV is a front elevationV of the upper portion of aweighing scale, with the casing broken away, showing the weighing leversand con-V nected scale beam with 4an embodiment of my invention appliedthereto.

Fig. 2 is a front elevation of the weighing levers through which theload receiver is connected with the scale beam with my invention appliedthereto, the parts being in position to prevent the operation of thescale beam and the weighing of va load greater than a predeterminedweight.

Fig. 3 is a view looking at the rear of the means actuated by thedepositing of a coin in a coin slot to release the weighing mechanism topermit the weighing of a load greater than a predetermined weight, and sowing the parts in normal position.

Fig. 4 is a view similar to Fig. 3 but showing the position to which theparts are moved duringrthe initial movement of insorting a coin in thecoin slot.

Fig. 5 is a view similar to Fig. 3 but showing the parts in the positionthey will assume as the coin passes through the coin slot and actuatingmeans to release the means preventing the weighing of a load greaterthan a predetermined weight.

Fig. 6 is a perspective view of a weighing scale showing the generaltype of scale to which my invention has been applied.

Fig. 7 is a view similar to Fig. 2 but showing the parts in positionafter the coin has been deposited and permitting the weighing of a loadgreater than the predetermined weight; and

Figs. 8, 9 and 10 are side elevations, partly in section, of the coinactuated means shown in Figs. 3, 4 and 5.

Y Similar characters of reference designate like parts throughout thedifferent views of thedrawin'gs. y

'The embodiment of my invention shown in the drawings comprises a base 6having an upright hollow column 7, said column supporting at its upperend an open frame 8 in which the scale beam is located. A Vload receiveror platform 9 is supported in an opening in the top of the base 6 bysuitable platform supporting levers (not shown) connected by a draft rod10 extending up through the column to an auxiliary weighing'lever'll,Vsaid lever being pivotally carried by a mainlever g12, as at'13, andsaid latter lever pivotallyl supported by knife edge bearings, as at 14.Thefauxiliary lever 11 is connected at one end to a scale beam by a link15, said scale beam being of the usual duplex structure having the mainbeam .15 pivotally supported, as at 16, and carrying the slidingcounterweight 17, and an auxiliary beam 18 connected to the beam 15 onwhich is adjustably mounted a weight 19, said scale beam having theusual ad]usting means as shown at 20,

As stated it is an object of the invention termined weight. For thispurpose there is v provided between the weighingV levers 11V and 12 aspring 20 coiled about a threaded stem 21 fixed to lever 12 to extenddownV through an opening in the lever 11, the

spring beingcined between the lever 11V and a knurled nut 24 on the endof the stem. By this construction as a load is placed on the receiver 9it will swing the lever 11 on thepivot 13 against the tension of thespring 20 and actuate the scale beam through the link 15. However, whenthe load on the receiver is of such weight that it will not furthercompress the spring 20 the weight of the load will beV taken up throughthe lever 1l by lever 12,said levers then acting as a unit and impartingmovement to the scale beam through the link 15. As soon as movement isimparted tothe lever 12 by the load a friction member 25, in the form ofa disk of suitable friction material, such as fiber, felt, leather,rubber or the like, carried by the end of a dog 26 pivotally mounted ona downward projecting portion of the lever 12, engages with a camsurface 27 on a depending portion 28 ofthe scale beam and therebyprevents actuation of the latter. This friction member, during theweighing of a load within a predetermined weight through the lever l1,is maintained out of engagement with the cam surface 27 by a projection29 extending laterally from the lever 1l engaging with a beveled face 30on said d As the lever 11 moves down and the projection slides down onthe beveled face 30 and the lever reaches the limit of this movementwhich is regulated through the spring 20 by the nut 24, the frictionmember will engage with the cam surface 27. However, to assure theforcible engagement of this member with the cam surface there isprovided a detent 31 having a pair of V notches in either oneof'which'notches a pin 32 extending laterally from the dog is adapted toengage, said pin being substantially of inverted V-shape in crosssection. In the normal position of the parts this pin will be caused bythe projection 29 of the lever 11 engaging with the beveled face 30 toassume a position so that one beveled side of the pin will engage withthe beveled side of the tooth formed by the V notches in the detent 31adjacent its apex, as shown in Fig. 1. Should the loaden the receiver besniiicient to overcome the tension of the spring 20 the pin will ride upthe inclined surface of such tooth and the friction member engage withthe cam surface 27 until the pin 32 will be at the bottom of the. recessat the outer end of the detent 3,the pin being 4 caused to assumesuchposition by the tension of a spring 34 connected to the detent.

It will be obvious that the greater' the load on the receiver thegreater will be the frictional contact between the member 25 and thecamV surface 27. Y By the adjustment of the nut 24 on thestem 21 the.tensionV of the spring 20 will be increased or decreased and therebythe limit to be weighed is determined without interfering with theoperation ofthe scale beam, and it willbe obviousthat this may be variedto suit requirements.

To throw thefriction member 25 out of en ement with the cam surface 27of the sca earn the dog 26 is connected by a rod or wireV 35 with onearm 36 of a two armed lever. The lever is pivotally supported, as at 37,within the column 7 of the scale casing with the other arm 38 of thelever extending across the lower end of the coin slot 39 and adapted toengage with ledres 40 rejecting from the inner surface o the wa l of thecasing at opposite sides of the coin slot but being of less length thanthe slot for a pur pose to be hereinafter described.

The lever is normally locked against movement with the one arm 38engaging with the ledges -10 by the end of a pivotally supported latch4l engaging with a pin 45 projecting from the lever arm 36. The latchnormally engages by gravity with a pin 43 projecting rom` a second latch11. The latch 4.1- is normally maintained in position to engage with theupper end of the ledges 40 by a spring 42 and thereby permitting thelatch 41' to assume a position to engage with the pin 45. The ledges l0being ofb less length than the coin slot the latch 41 also engages inback of a portion of the slot adjacent the top thereof, the latchesandrlever assuming thepositions shown in Fig. 3.

The friction member 25 is adapted to be thrown out of engagement withthe friction surfacer27 of the scale-beam by the insertion of a coin Cin the coin slot. The entering end of the ycoinslot is made of segmentalshape by providing forwardly extending projections 43 adjacent the topand bottom of the coin slot, and the bottom wall of Athe slot inclinesdownwardly from the outer tothe inner surface of the casing, as clearlyshown in Figs. 8, 9 and l0. As a coin is inserted into the: slot thelower p0rtion of the coin will ride or" roll over the upper end oftheinclined bottom of the slot, and the edge of the coin adjacent the topwill enga eY with a cam surface 44 formedon the atch 41 moving the latchup ward and with it the latch 41 throwing the latter out of engagementwith the lever pin 45 and away rom the coin slot, as showin in Figs., land 9.. Y As the coin is pushed or rolled farther into or through thecoin, slot the pressure of the latch 41 onthelcointhrough the spring 42will cause the com to forcibly engage with the arm nasa-551 38 of thelever (as shown in Figs. 5 and 10) moving said lever arm downward andthereby throw the arm 36 and through its connection with the frictionmember carrying dog 26 it will pull the dog carrying the friction member25 backward against the action of the spring detent 3l and cause the pin32 to engage in the second recess in the detent thereby holding thefriction member out of engagement with the cam surface 27 and permittingof the free actuation of the scale-beam. It will be noted that the coinslot is located in and the lever 36, 38 and latches 41, 41 are mountedupon a plate 46 removably secured in an opening in the column of thecasing. This facilitates the assembling of this mechanism and permitsthe ready removal of the same for repairs and substitution of parts. Y

As soon as a load is removed lfrom the receiver 9 the tension of thespring 20 will cause the weighing lever 11 to assume its normal positionadjacent the lever 12, as shown in Fig. l, and during this movement ofthe lever ll a pawl 47 pivotally carried by the lever 11, which hadpreviously been caused to engage with one of a series of serrations orteeth on the back Aof the dog 26 when the latter was thrown to theposition with the friction member out of engagement with the cam surface27 of the scale beam by the operation of the lever 36, 38 with the pin32 in engagement with the second recess in the detent 31, will exert aforward pressure on the dog 26 throwing the pin 32 out of engagementwith the second detent recess against the action of the spring 34 andcause said pin to engage in the recess adjacent the end of the detentand the dog to be in position whereby the friction member 25 may engagewith the friction surface 27 of the scale-beam when a load greater thana predetermined weight is placed upon the load receiver, and permit theweighing of loads which come within such predetermined weight.

The provision of the forwardly extending projections 43 at the top andbottom of the coin slot and the inclining of the bottom wall of the slotprevents the actuation of the latch 41. and lever 36, Y38 by theinsertion of an instrument other than a coin,

such as a knife blade or :the like, in the coin slot to release thelocking means of the weighing mechanism to permit the weighing of a loadgreater than a predetermined weight.

Having thus described my invention claim:

1. In a weighing scale the combination with weighing mechanism includinga scalebeam and a load-receiver connected thereto7 of a casing to carrythe weighing mechanism and inclosing a portion thereof having a coinslot; means operable by a load placed upon the load-receiver to preventthe actuation of the scale-beam; and means operable by a coin depositedin and during its passage through the coin slot with a load upon theload-receiver to release said means preventing the actuation of thescale and permit the weighing of a load on the loadreceiver.

2. In a weighing scale the combination with weighing mechanism includinga loadreceiver, a scale-beam and a weighing lever to connect theload-receiver and scale-beam, of a casing to carry and inclose a portionof said weighing mechanism having a coin slot; means carried by theweighing lever to cooperate with the scale-beam to prevent the actuationof the latter by a load on the load-receiver; and means operable by acoin deposited in and during its passa e through the coin slot with aload on t e receiver to release said latter means from and permit theactuation of the scale-beam and the weighing of the load on theloadreceiver.

3. In a weighing scale the combination with weighing mechanism includina loadreceiver, a scale-beam and a weighing lever to connect theload-receiver and scale-beam, of a casing to carry the weighin mechanismand inclose a portion thereo having a coin slot; means operable by aload on the load-receiver to retard the actuation of the scale-beam; andmeans operable by a coin deposited in and during its passage through thecoin slot with a load on the load-receiver to release said means toretard the actuation of the scale-beam and permit the weighing of theload on the loadreceiver.

4. In a weighing scale the combination with weighing mechanism includinga loadreceiver, scale-beam and weighing lever to connect theload-receiver and scale-beam, of a casing to carry the weighingmechanism and inclosing a portion thereof having a coin slot; meansoperable to permit the actuation of the weighing mechanism and theweighing of ,a load on the load-receiver within a predetermined weightand to prevent the actuation of the weighing mechanism and the weighingof a load on the receiver greater than such predetermined Weight;and-mechanical means operable by a coin deposited in and during itspassage through the coin slot to release said means preventing theactuation of the weighing mechanism and the weighing of the load greaterthan such predetermined weight on thc load receiver.

5. In a weighing scale the combination of weighing mechanism including aloadreceiver, a scale-beam and a weighing lever to connect theload-receiver and scale-beam;

a casing to carry the weighing mechanism and inclosing a portion thereofhaving a coin slet; friction means to cooperate Awith the scale beam andnormally out of engagement therewith to permit the weighing of a load onthe load-receiver Within a predetermined weight and thrown intooperativo engagement to retard the movement of the scale beam by a loadon the load-receiver greater than such predetermined weight; andVmechanically operated means actuated by a coin deposited in the coinslotto release said friction means and permit the Weighing of such Yloadgreater than such predetermined weight on the load receiver.

6. In av weighinfy scale the combination of weighing mechanism includinga load-receiver, a scale-beam and a weighing lever to connect theload-receiver and scale-beam; a casing to carry the weighing mechanismand inclosing a portion thereof having a coin slot; means carried by theWeighing lever to coperate with the scale-beam to prevent the actuationof the scale-beam by a load on the receiver; and a latch normallyextending across a portion of the coin slot to cooperate with meansthrough a coin deposited in the coin slot to release the means carriedby the Weighing lever and coperating with the scale-beam to preventactuation of the latter' by the depositing of the coin and permit theWeighing of a load on the receiver.

7. A Weighing scale comprising a loadreceiver; a scale-beam having a camportion; a Weighing lever to connect the loadQ receiver and scale-beam;a casing to carry the load-receiver, scale-beam and Weighing lever andinclosing a portion thereof, said casinghaving a coin slot; n dogcarried by the weighing lever to engage with the cam portieri of thescale-beam to prevent the actuation of the latter by a load on thereceiver; and a spring influenced latch normally extending across thecoin slot to cooperate with means through a coin deposited in the coinslot to release the dog from the cam portion of the scale-beam upon thedepositing of the coin, substantially as and for the purpose specified.

8. A 1weighing scale comprising a load receiver: a scalebeam having acam portion; a weighing lever to connect the loadreceiver andscale-beam; a. casing to carry the load-receiver, scale-beam andWeighing,1 lever and inclosing a, portion thereof, said casing having acoin slot; a dog carried by the Weighing lever to engage with the camportion of the scale-beam to prevent the actuation of the latter by aload on the receiver; a spring influenced latch normally extendingacross a portion of the coin slot; and a lever connected to the clog,said lever being operable by the latch through a coin deposited. in thecoin slot to releasethe dogV from the cam portion. of the scale-beam bythe depositing of the coin in the coin slot,

naam

ulstantially as and for the purpose speci- 9. In a Weighing scale thecombination with Weighing mechanism including a scalebealn and aload-receiver connected thereto, of a casing to carry the Weighingmechanism and inclosing a portion Vthereof having a coin slot; meansoperable by a load placed upon the load-receiver to prevent theactuation of the scale-beam; a latch extending across the coin slotoperable by a coin deposited in and during its passage through 'the coinslot when a loadiis placed upon the load receiver to release said meanspreventing the actuation of the scale and permit the weighing of a loadon the load-receiver; and means operable when the load is removed fromthe receiver to restore to initial position the means to prevent theactuation of the scale-beam by a load on the receiver.

1). In a Weighing scale the combination with Weighing mechanismincluding a loadreceiv'er, a scale-beam and a Weighing lever to connectthe load-receiver and scale-beam, of a casing to carry the weighingmechanism and inclose a portion thereof having a coin slot; meansoperable by a load on the loadreceiver tofretard the actuation of thescalebeam; a. latch extending across a portion of the coin slot operableby a coin deposited in and during its passage through the coin slot whena load is placed on the load-receiver to release said means to retardthe actuation of the scale-beam and permit the Weighing of a load on theload-receiver; and means operable When the load is removed from thereceiver to return the means to retard the actuation of the. scale-beamby a load on the receiver to initial position.

11. Ina weighing scale the combination of Weighing mechanism comprisinga scalebeam, a load-receiver and weighing levers to connect theload-receiver and scale-beam; a casing to carry and inclose a portion ofsaid Weighing mechanism and having a coin slot; means carried by theWeighing levers to cooperate with the scale-beam to prevent the Weighingof a load on the load-receiver; a spring influenced pivoted latchnormally extending across a portion of the coin slot; and means actuatedby said latch through a coin.deposited' in the coin slot to release themeans carried by the lever cooperating with the scale-beam to preventthe Weighing of a load on the receiver and permitI the Weighing ofaloadV on the receiver.

12. YIn a Weighing scale, the Vcombination of weighing mechanismincluding a scale beam having a cam portion, a load-receiver, and aWeighing lever to connect the load-receiver andscale-beam; a casing tocarry and lnclose a portion of the Weighing mechanismhavin'g a coinslot; a dog carried'by the weighing lever' operable to engage with thecam portion of theL scaesheaf a load en the receiver and prevent theactuation of the scale-beam; a lever connected to the dog; a latchhaving a part to lock the lever against movement in the normal positionthereof; and a second pivoted spring influenced latch normally extendingacross a portion of the coin slot, said latch being operable to actuatethe first latch to release the lever and actuate the lever to releasethe dog from the cam portion of the scale-beam by a coin deposited inand during its passage through the coin slot, substantially as and forthe purpose specified.

13. In a weighing scale, the combination of weighing mechanism includinga scalebeam having a cam portion, a load-receiver, and a weighing leverto connect the load-receiver with the scale-beam; a casing to carry andinclose a portion of the Weighing mechanism; a coin slot in said casingone end wall of which slot inclines downward from the outer to the innersurface of the casing and having ledges on the inner surface of thecasing adjacent the coin slot and of less length than the coin slot; adog carried by the weighing lever operable to engage with the camportion of the scale beam y a load on the receiver to prevent theactuation of the scalebeam; a lever connected to the dog having a partengaging with the ledges and extending across that portion of the coinslot hav ing the inclined wall; a latch cooperating with said lever tolock the same against movement; and a second pivoted spring influencedlatch normally engaging with the ledges and extending across a portionof the coin slot at the end opposite to the inclined wall of the slot;said lever being released by the lever locking latch and operable by thesecond latch to release the dog from the cam portion of the scale-beamthrough a coin deposited in the coin slot, substantially as and for thepurpose specified.

14. In a weighing scale the combination of a scale-beam having a camportion; a receiver or the load to be weighed; weighing levers toconnect the load-receiver with the scale-beam; a casing to carry thescale-beam, load-receiver and weighing levers and inclosing the latterand the connection thereof with the load-receiver; a coin slot in thecasing one end Wall of the slot inclining downward from the outer to theinner surface of the casing; a ledge on the inner surface of the casingadjacent the coin slot and of less length than the slot; a dog carried bthe weighing levers operable to engage wit the cam portion of thescale-beam by a load on the receiver to prevent actuation of thescale-beam; a pivoted spring-influenced latch normally engaging with theledge and extending across a portion of the coin slot at the endopposite to the inclined end wall of the slot; a bell-crank lever havingone arm connected to the dog and the other arm normally engaging withthe ledge and eX- tending across a portion of the coin slot at the endhaving the inclined wall and locked in such position by the latch, saidlever being unlocked by the latch upon the depositing of a coin in thecoin slot and operable by said latch through the deposited coin torelease the dog from the cam portion of the scale-beam substantially asand for the purpose specified.

Signed at New York city, in the county of New York, and State of NewYork.

REUBEN H. HELSEL.

Witnesses:

W. I-I. KEICKNER, IDA A. KnssLEE.

Uopiea ot this patent may be obtained for nve cents each, by addressingthe commissioner of Patents, Washington, D. 0.

